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GCN Circulars

GCN Circulars are rapid bulletins submitted by and distributed to the community. See the documentation for help with subscribing to or submitting Circulars.

Search for Circulars by submitter, subject, or body text (e.g. 'Fermi GRB').
To navigate to a specific circular, enter the associated Circular ID (e.g. 'gcn123', 'Circular 123', or '123').
Advanced Search

To narrow the search results, use advanced search syntax. This allows for specifying which circular field to search (submitter, subject, and/or body). For additional information, refer to the advanced search documentation.

Advanced Search Examples (click to copy):

subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

36003 results found.

  1. XRF020427: Chandra Identification of a Likely X-ray Counterpart
  2. IPN triangulation of a burst from SGR1806-20
  3. GRB/XRF 020427, Radio Observations
  4. HST detection of the likely host galaxy of GRB 020124
  5. XRF020427: Chandra Observations and Candidate X-ray Counterparts
  6. GRB(XRF) 020427: X-ray afterglow with BeppoSAX
  7. GRB020321 : Optical observations.
  8. GRB020427 BeppoSAX NFI Observation
  9. XRF 020427
  10. GRB020331: Third Epoch and Revised Second Epoch Optical
  11. The end of BSAX GRB activities
  12. GRB 020410, Radio Observations
  13. GRB 020418: Optical observations
  14. GRB 020124: Optical observations
  15. GRB 020418: Optical observations
  16. IPN triangulation of GRB020418
  17. GRB020405: VLT observations of the OT environment
  18. GRB020410: BeppoSAX NFI observations refined analysis
  19. GRB 020409: Optical Observations
  20. Mars Odyssey joins the IPN
  21. IPN triangulation of GRB020413
  22. GRB 020409, 2-nd epoch optical observations at Terskol.
  23. GRB 020409: Optical observations
  24. GRB 020409, No Optical Detection to R = 22
  25. GRB 020409: No Evidence for an Optical Afterglow
  26. GRB 020409, 2nd epoch optical observations
  27. GRB 020331 Kyoto observation on March 31
  28. GRB 020409
  29. GRB 020409 SARA Observations
  30. GRB "020411"
  31. GRB 020409, No Optical Detection to R = 20
  32. GRB020410: BeppoSAX NFI observation
  33. GRB 020409: Optical observations
  34. April 11 BeppoSAX event (GRB020411) is likely not a GRB
  35. GRB 020410, optical observations
  36. BeppoSAX ALERT: possible GRB020411
  37. GRB 020409, optical observations
  38. GRB 020409: Optical Observations
  39. GRB020406(?), optical observations
  40. GRB020410, optical observations
  41. BeppoSAX ALERT: possible GRB020410
  42. X-ray afterglow of GRB020321
  43. BeppoSAX GRB : GRB020409
  44. GRB020405: VLT optical observations and V band decay slope
  45. GRB020331 optical observations with RIMOTS
  46. GRB020124 optical observations with RIBOTS/RIMOTS
  47. GRB 020321: Candidate X-ray Counterparts
  48. ASM GRB candidate 020406 refined error box
  49. GRB 020405: Moderate-resolution spectroscopy
  50. GRB020406(?), optical observations
  51. GRB020405: VLT optical observations
  52. Revised Photometry of the Optical Afterglow of GRB 020405
  53. GRB020405: OT observations
  54. GRB 020331: Candidate Optical Afterglow
  55. GRB 020405: Decay index
  56. Short RXTE/ASM transient 020406; may be a GRB
  57. GRB020405, Radio Observations
  58. Fading Optical Afterglow and Possible Host Galaxy of GRB 020405
  59. GRB 020405, U-band observations
  60. GRB 020405: Optical afterglow candidate
  61. IPN localization of GRB020405
  62. GRB011212: Optical Observations
  63. GRB 020331: NIR Observations
  64. GRB 020331: NIR Observations
  65. GRB020331 NIR observation at KPNO (re-submission)
  66. GRB02033 NIR observation at KPNO
  67. GRB020331 field photometry
  68. GRB 020331 Optical Observations
  69. GRB 020331, NIR observations
  70. GRB 020331: Optical observations
  71. GRB020331(=H1963): The "Easter" Burst Detected by HETE
  72. GRB 020321: Infrared observations
  73. GRB 020322: BeppoSAX observations of the X-ray afterglow
  74. SN 2002ap - peak brightness date (SN/GRB?)
  75. GRB 020322, Radio observations
  76. Near-Infrared Observations of GRB020322 at TIRGO
  77. GRB 020321, Radio Observations
  78. GRB 020322: Optical Observations
  79. GRB020127: Proposed Host Galaxy Detection and Identification of Afterglow
  80. GRB 020321: Optical observations
  81. GRB020317 BVRI field photometry
  82. GRB011211 revised BVRI field photometry
  83. GRB020305 BVRI field photometry
  84. GRB020322 BVRI field photometry
  85. GRB 020322 optical observations
  86. GRB 020322 optical observation
  87. GRB020317 : Near IR Observations from Mt Abu Observatory
  88. GRB 020322: Optical Sources and Improved Astrometry
  89. GRB020322, optical observations
  90. GRB 020322: Optical candidate
  91. GRB020322: BeppoSAX/NFI Observations
  92. Bepposax GRB020322 The second springtime BSAX GRB
  93. GRB 020321: Optical observations
  94. GRB 011121: Fourth Epoch of HST Imaging
  95. GRB020317: optical observations
  96. GRB020321 optical observations
  97. GRB020321: BeppoSAX/NFI Observations
  98. GRB020321: a faint BeppoSAX detection
  99. GRB 020317 : KISO Optical Observations
  100. BeppoSAX ALERT: GRB020321, the "Springtime Burst"

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